Sound-insulating side part for an engine compartment, a mudguard for performing this function, and a side module made from such a mudguard

Inactive Publication Date: 2003-09-11
CO PLASTIC OMNIUM
View PDF4 Cites 17 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0022] This ensures that the fender and the hood can remain spaced apart from each other with clearance determined by assembly criteria, but without noise leaking out.
[0028] The sound-insulating part of the invention is situated in the immediate vicinity of another part of the vehicle which traditionally performs a function quite different from insulating engine noise, namely the mudguard. A mudguard is generally a flexible part overlying the top portion of the wheel inside the fender for preventing water and particles projected from the tire striking the inside of the fender. The mudguard is therefore intended to protect the inside of the fender, and this has the effect of preventing noise being generated by matter being thrown against the fender or to friction due to the tire running on the roadway, however that function plays no part in reducing noise emission from the engine.

Problems solved by technology

The engine compartment of a motor vehicle generates a large amount of noise due to the operation of an internal combustion engine.
Those measures have very significant attenuating effects on the emission of engine noise to the outside of the vehicle, but they are not totally satisfactory since internal combustion engine vehicles remain quite noisy in city traffic.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Sound-insulating side part for an engine compartment, a mudguard for performing this function, and a side module made from such a mudguard
  • Sound-insulating side part for an engine compartment, a mudguard for performing this function, and a side module made from such a mudguard
  • Sound-insulating side part for an engine compartment, a mudguard for performing this function, and a side module made from such a mudguard

Examples

Experimental program
Comparison scheme
Effect test

first embodiment

[0106] In a first embodiment, as can be seen in FIG. 2, a flexible lip 29 formed on the mudguard bears against the outside wall of the housing 30 of the shock absorber. Under such circumstances, the passage of the shock absorber through the mudguard is left without sealing, but this does not matter since the engine compartment does not communicate with the inside of the shock absorber housing, because of the flexible lip 29.

second embodiment

[0107] In a second embodiment, shown in FIGS. 10 and 11, and more clearly visible in FIG. 12, the mudguard is extended upwards by a cap 31 which begins at the periphery of the orifice 27 through which the shock absorber 28 passes and which extends immediately over said shock absorber, such that the shock absorber is enclosed in the same volume as the wheel and no passage is provided between the engine compartment and said volume, not even around the shock absorber.

[0108] In practice, the cap 31 is a separate piece in the form of a pot which is placed upside-down over the shock absorber and which has an end wall that is clamped when the shock absorber is put into position between the shock absorber and the shock absorber housing.

[0109] While the mudguard is being put into place by opening up its slot, it takes position around the base of the cap. It is held there vertically by an outer edge 32 thereof forming a collar, as can be seen in FIG. 12.

[0110] Under such circumstances, the mu...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention provides a sound-insulating part for a motor vehicle having an engine compartment and, beside the engine compartment, a clearance volume for accommodating vertical travel of a wheel of the vehicle, the part being characterized by the fact that it is arranged to form a sound screen between said engine compartment and said volume. The invention also provides a mudguard constituting such a sound-insulating part and a side module made from such a mudguard.

Description

[0001] The present invention relates to a sound-insulating part for processing engine noise passing through the side vertical face of the engine compartment of a motor vehicle, to a mudguard performing this function, and to a side module made from such a mudguard.[0002] The engine compartment of a motor vehicle generates a large amount of noise due to the operation of an internal combustion engine.[0003] To reduce the emission of sound to the outside of the vehicle, it is known to line the inside face of the hood with sound insulation and to place a screen beneath the engine to absorb sound emission and prevent engine noise from propagating to the outside of the vehicle by reflection on the roadway.[0004] Those measures have very significant attenuating effects on the emission of engine noise to the outside of the vehicle, but they are not totally satisfactory since internal combustion engine vehicles remain quite noisy in city traffic.[0005] The authors of the present invention hav...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): B60R13/08B62D25/16
CPCB60R13/0838B62D25/161B60R13/0861B60R13/0853
InventorDECKER, LAURENTGILOTTE, PHILIPPEFAYT, ARNOLD
OwnerCO PLASTIC OMNIUM